Scientists at the Australian National University (ANU) have recently discovered luminescence properties in thin-layer phosphorous studies that are expected to be ultra-thin and ultra-light solar (PV) cells and light-emitting diode (LED) applications. Open a line of dawn.
The team used the same method as the discovery of graphene to win the Nobel-prize physics award, using tape stripping to create a single atomic thick layer of phosphorus, "phosphorene." However, compared to graphene, phosphoenene is a semiconductor more like Silicon, which is the basis of current electronic technology.
“Because the phosphene is light and thin, it creates opportunities for many interesting devices, such as LEDs or solar cells,†said Lu Yurui, an engineering and computer science researcher at the Australian National University who led the research, and “it shows Very promising luminescent properties."
The research team used tape to re-peel the thinner crystal layer in the black crystalline form of phosphorus to create a phosphonene. In addition to creating semiconductors that are thinner than tantalum, phosphonene also has a laminate of luminescent properties and thicknesses for more flexible manufacturing.
“This feature has never been found in other materials in the past,†Lu said. The research he led has been published in the natural journal series Light: Science and Applications. "By changing the number of layers, we can tightly control the energy gap and determine the properties of the material, such as the color emitted by the LED."
“The different colors of the sample can be seen fairly clearly through the microscope, and it will tell you how many layers there are,†Lu said.
Lu’s research team found that the single-layer phosphonene has a light gap of 1.75 eV, which is equivalent to a red wavelength of 700 nm. As the number of layers increases, the optical gap becomes smaller. For example, the light gap value at 5 layers is 0.8 electron volts, and the red light wavelength is about 1,550 nm. As for the thicker laminate, the optical gap value is about 0.3 eV, which is equivalent to a 3.5 micron mid-band red light.
Phosphorene performs better in enamel than in bismuth, Lu said. "Because the surface state of phosphene can be minimized, it is different from the enthalpy that is too thick for surface conditions to be used in thin and light states."
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